My Best Fiend.
Man, that Klaus Kinski was a total maniac!
This documentary by german director Werner Herzog tells us about his friendship with actor Klaus Kinski with whom he made 5 movies with.
The 5 movies being Aguirre - Wrath of God, Nosferatu, Fitzcarraldo, Woyzeck and Cobra Verde.
If you are interested in the films they made together i recommend you to first watch this documentary, it will make you appreciate and understand them better.